The items in red are values that I've calculated so they could well be wrong. A faint star will have a high number. You also have the option to opt-out of these cookies. IC 443 is the remains of a star that went supernova somewhere between 5,000 and 10,000 years ago. In both optical and X-ray wavelengths, nebula’s emission is heavily absorbed by a huge molecular cloud located in the foreground. The star is moving -13.10 ± 0.15 milliarcseconds/year towards the north and -6.82 ± 0.28 milliarcseconds/year east if we saw them in the horizon. If you want that in miles, it is about 2,954,361,967,547,155.04, based on 1 Ly = 5,878,625,373,183.61 miles. The smaller southern shell, seen here in a bright cyan colour on the bottom half of the image, is constructed of denser clumps and knots primarily emitting light from hydrogen gas and heated dust. [1], Mu Geminorum forms the primary or 'A' component of a double star system designated WDS J06230+2231 along with UCAC2 39641417[13] (also designated WDS J06230+2231BC), itself a binary pair. Mu Geminorum (μ Geminorum, abbreviated Mu Gem, μ Gem), formally named Tejat /ˈtiːdʒət/,[12] is a single star in the northern constellation of Gemini. Also in Auriga, NGC 2281 is a much closer cluster (1,800 light years) and is rather less impressive than its Messier neighbours. [6], It is a slow irregular variable of type LB. It lies at an approximate distance of 5,000 light years from Earth and has an apparent magnitude of 12. [21], Mu Geminorum has an average apparent visual magnitude of 2.9,[2] which makes it the fourth-brightest member of Gemini. There's no register feature and no need to give an email address if you don't need to. GH follow GG, all the way up to ZZ then a V and a number is the next in the order. If r is the radius of the Earth, the shadow's width is close to 2r. What is unusual about the IC 443 is that its shell-like form has two halves that have different radii, structures and emissions. Mu Geminorum varies by about two-tenths of a magnitude over a 27 day period. As an example, the distance between the planet Mercury and Earth can range from 77 million km at the closest point, to as far as 222 million km at the farthest. It consists of complex filaments that are emitting light from iron, neon, silicon and oxygen atoms and dust particles, which are heated by the blast from the supernova event. Cookies / About Us / Contact Us / Twitter / Facebook, Nu. Image: NASA/JPL-Caltech/WISE Team, Constellation: Gemini In 2007, Hipparcos data was revised with a new parallax of 5.99000 which put Nu Geminorum at a distance of 544.51 light years or 166.94 parsecs. The star's Galacto-Centric Distance is 7,562.00 Parsecs or 24,664.47 Light Years. This category only includes cookies that ensures basic functionalities and security features of the website. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. It has a faint companion (mag. [14] In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[17] to catalogue and standardize proper names for stars. Galactic coordinates: G189.1+3.0 the middle of the Earth passes in front of the Sun). satellite operation launched in 1989 for four years. This website uses cookies to improve your experience while you navigate through the website. The designations of the double star's components as WDS J06230+2231A and BC derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).                          [16] The name Tejat Posterior was formerly applied to an asterism consisting of this star, along with Gamma Geminorum (Alhena), Nu Geminorum, Eta Geminorum (Propus), and Xi Geminorum (Alzirr). Using the most recent figures given by the 2007 Hipparcos data, the star is 544.51 light years away from us. There is a huge amount of different in the distances between the planets depending on their position on their orbit path. Mu Geminorum has an average apparent visual magnitude of 2.9, which makes it the fourth-brightest member of Gemini. is the number of times that the star is from the Earth … Designations: Jellyfish Nebula, IC 443, Sharpless 248 HD 160691), located in the constellation Ara. These clumps are part of a molecular cloud which can be seen in this image as the greenish cloud cutting across IC 443 from the north-west to south-east. Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 6.49000 which gave the calculated distance to Nu Geminorum as 502.56 light years away from Earth or 154.08 parsecs. The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. It has the designation NGC 2168 in the New General Catalogue. Nu Geminorum has an apparent magnitude of 4.13 which is how bright we see the star from Earth. [19], In Chinese, 井宿 (Jǐng Su), meaning Well (asterism), refers to an asterism consisting of Mu Geminorum, Gamma Geminorum, Nu Geminorum, Xi Geminorum, Epsilon Geminorum, 36 Geminorum, Zeta Geminorum and Lambda Geminorum. The nebula can be found between the stars Mu and Eta Geminorum, at … The supernova event produced the nebula and the neutron star CXOU J061705.3+222127. [15], Mu Geminorum bore the traditional name of Tejat (or more precisely, Tejat Posterior), from an old southern Arabic word of unknown meaning, tiḥyāt. Mu Geminorum) on February 1, 2017 and it is now so included in the List of IAU-approved Star Names. Glossary A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days). Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. All messages will be reviewed before being displayed. Aristarchus around 270 BC derived the Moon's distance from the duration of a lunar eclipse (Hipparchus later found an independent method). An eclipse of the Moon occurs when the Moon passes through the shadow of the Earth, on the opposite side from the Sun (therefore, we must be seeing a full Moon). It is purely that the distance was recalculated. The nebula can be found between the stars Mu and Eta Geminorum, at the foot of one of the celestial Twins. But opting out of some of these cookies may have an effect on your browsing experience. The nebula can be found between the stars Mu and Eta Geminorum, at … In that time the Moon covers a distance of 2πR, where π~ 3.1415926... (pronounced "pi") is a mathematical constant, the ratio  (circumference/diameter)  in a circle. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. It is 0.8 degrees south of the ecliptic, so it is subject to occultations by the Moon and, rarely, by planets. It lies at an approximate distance of 5,000 light years from Earth and has an apparent magnitude of 12. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 5.37. Any telescope will easily split this wide pair of 122 arc seconds separation. It is mandatory to procure user consent prior to running these cookies on your website. The number of A.U. Mu Geminorum) on February 1, 2017 and it is now so included in the List of IAU-approved Star Names. The neutron star is moving away from the site at about 800,000 km/h. Let t be the time it takes the mid-point of the Moon to cross the center of the shadow, about 3 hours (in eclipses of the longest duration, when the Moon crosses the center of the shadow). The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from. If you used the 1997 Parallax value, you would get an absolute magnitude of -1.81 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.98. Based on the spectral type (B6III) of the star, the star's colour is blue . Based on the star's spectral type of B6III , Nu Geminorum's colour and type is blue giant star. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. We also use third-party cookies that help us analyze and understand how you use this website. Mail to Dr.Stern:   stargaze("at" symbol)phy6.org . The nebula can be found between the stars Mu and Eta Geminorum, at the foot of one of the celestial … [Read more…]. It lies at an approximate distance of 5,000 light years from Earth and has an apparent magnitude of 12. Image: Wikisky. The larger shell is part of a different supernova remnant, designated as G189.6+3.3. Image:NASA/DOE/Fermi LAT Collaboration, NOAO/AURA/NSF, JPL-Caltech/UCLA. All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. Observations with the Chandra X-ray Observatory and XMM-Newton have revealed a plerion nebula near the southern edge of the supernova remnant. [19], In Chinese, 井宿 (Jǐng Su), meaning Well (asterism), refers to an asterism consisting of Mu Geminorum, Gamma Geminorum, Nu Geminorum, Xi Geminorum, Epsilon Geminorum, 36 Geminorum, Zeta Geminorum and Lambda Geminorum. The blast from the supernova sent out shock waves that travelled through space, sweeping up and heating the surrounding gas and dust in the interstellar medium, and creating the supernova remnant seen in this image. The WGSN decided to attribute proper names to individual stars rather than entire multiple systems.